React Native Storybook

setupSnapshotTest.ts

import addons from '@storybook/addons';
import { createMockChannel } from 'src/test/storybook/storyshots/mockChannel';

//
// This runs to mock things required for the jest snapshot of a story
//
// In generated test, import this straight as `import 'src/test/storybook/storyshots/setupSnapshotTest'`
// Then require mocked storybook methods
// `const { configure, getStorybook } = require('@storybook/react-native');`
//

// mock some things for the storyshot jest tests
jest.mock('global', () => ({
  ...global,
  fetch: jest.fn(), // stop accidental api calls
}));

// stop accidental api calls
jest.mock('axios');

// mock global and local addDecorator so they are not in snapshot
jest.mock('@storybook/react-native', () => {
  const actual = require.requireActual('@storybook/react-native');
  return {
    ...actual,
    storiesOf: (...args: any[]) => {
      const storybook = actual.storiesOf(...args);
      storybook.addDecorator = () => storybook;
      return storybook;
    },
    addDecorator: () => null,
  };
});

// mock timers for animated components
jest.useFakeTimers();

// don't need storybook running
addons.setChannel(createMockChannel());